you should throw in a physX card aswell, or what they are named. I cant remember but guess ingame physics is being calcylated with the cpu(s). (via gpu perhaps?) PhysX cards takes over the calculations for all ingame physics atleast, so you can have not only amazing topnotch graphics but aswell houndreds of things bouncing around in real-time physics ingame! now thats class.
not to many games that supports it right now but think we will see more of this in the future
edit:
in future i hope we will see more of this
Unreal Engine 3 VS CryEngine 2:
http://www.youtube.com/watch?v=sJHY0KYpc_8&NR=1 posting that one cos its a rly amazing demo of graphic and a rly nice song but i dont know what song it is
(mixed with this:
http://www.youtube.com/watch?v=yIT4lMqz ... re=related
later on comparing real time physics using only cpu (on a normal comp) and then kicking in ageia PhysX cards. neat different
(if its the thing i am looking at 
) its 2 times bigger then my old one